@Override
 public void onCheckOut() {
   super.onCheckOut();
   this.setVisible(true);
   this.m_useTargetPositionning = true;
   this.m_align = Alignment9.NORTH;
   this.m_watcherContainerAdviser = new WatcherContainerAdviser();
   MasterRootContainer.getInstance().addEventListener(Events.RESIZED, this, false);
 }